<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>我的插件</title>
  <link rel="stylesheet" href="popup.css">
</head>
<body>
  <div class="container">
    <h3>我的第一个插件</h3>
    <button id="changeColor">改变页面颜色</button>
    <div id="status"></div>
  </div>
  <script src="popup.js"></script>
</body>
</html>